Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
In control theory, specifially in $H_2/H_\infty$ or $\mu$ synthesis and analysis, pretty much everything relies on the SVD. For further info, see e.g.
SVD controllers for $H_2$, $H_\infty$ and $\mu$ optimal control
